エノモト　ミカ   榎本　美香    所属   メディア学部 メディア学科    職種   准教授
言語種別	英語
発行・発表の年月	2016/12
形態種別	国際会議論文
査読	査読あり
標題	A study on prediction of end-of-utterance by prosodic features and phrase-dependency structure in spontaneous speech
執筆形態	共著
掲載誌名	5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan
掲載区分	国外
巻・号・頁	pp.3393
著者・共著者	Yuichi Ishimoto, Takehiro Teraoka and Mika Enomoto
概要	This study is aimed at predicting the end of utterance by prosodic features and syntactic structure for spontaneous speech. In spontaneous everyday conversation, participants must predict the ends of utterances of a speaker to perform smooth turn taking. We consider that they utilize not only syntactic factors but also prosodic factors for the end of utterance prediction because of the difficulty of prediction of a syntactic completion point in spontaneous Japanese speech. In previous studies, it was observed that prosodic factors changed such that the general fundamental frequency of utterance declined gradually toward the end of an utterance, and the intensity decreased significantly in the final accentual phrase. However, it is not clear what prosodic features support the prediction. We focused on dependency structure among bunsetsu phrases as the syntactic factor and investigated the relation between the phrase dependency and prosodic features based on a spontaneous Japanese conversation corpus. The results showed that the average fundamental frequency and the average intensity for accentual phrases did not decline until the modified phrase appeared. This suggests the possibility that prosodic changes and phrase dependency relations inform the hearer that the utterance is approaching its end.